Hydropower station volute pressure maintaining pouring monitoring and early warning device

Abstract

The utility model discloses a hydropower station volute pressure maintaining pouring monitoring and early warning device which comprises a volute pressure maintaining pouring assembly, and a monitoring and early warning assembly is arranged on the peripheral side of a volute top cover piece and located on the outer wall of a volute body. The monitoring and early warning assembly comprises a top cover outer sleeve ring arranged on the peripheral side of the volute top cover part in a sleeving mode, a movable arc-shaped mounting plate with the arc-shaped movement adjusting position on the outer wall of the volute body and a sliding block support slidably installed on the outer wall of the movable arc-shaped mounting plate. A first displacement sensor for monitoring displacement of the volute body after concrete pouring is arranged on the outer wall of the sliding block support, and second displacement sensors for monitoring the displacement condition of the seat ring piece are arranged on the inner walls of the upper side and the lower side of the seat ring piece correspondingly. A stress protection adjusting assembly used for resetting and adjusting the displaced volute body is further arranged outside the peripheral side of the volute body, and the terminal of the stress protection adjusting assembly is used for applying force to push the volute body to reset.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydropower stations, and in particular to a monitoring and early warning device for the pressure maintaining casting of a spiral case of a hydropower station. Background Technique

[0002] During the construction of a hydropower station, the pressure maintaining casting of the spiral case structure is a key link, which directly affects the operation safety and efficiency of the whole power station. The spiral case is usually cast with concrete in an underground or underwater environment. This process faces huge hydraulic pressure and earth pressure, which easily causes displacement or stress concentration of the spiral case structure, and then leads to structural damage or even collapse. Therefore, it is crucial to ensure the structural stability and safety during the casting process of the spiral case.

[0003] At present, the traditional monitoring methods for the pressure maintaining casting of the spiral case mainly rely on regular manual inspections and simple mechanical monitoring means. However, there are still deficiencies. Manual inspections cannot achieve continuous monitoring, there are monitoring blind spots and time lags, and small structural displacements and stress changes cannot be detected in time, which may lead to potential safety hazards not being dealt with in time. At the same time, the installation and adjustment of traditional monitoring devices are relatively complex, and it is difficult to adapt to the dynamic changes at different positions during the casting process of the spiral case. Especially after the structure is displaced, the monitoring accuracy and reliability are reduced. Content of the Utility Model

[0004] The purpose of the utility model is to provide a monitoring and early warning device for the pressure maintaining casting of a spiral case of a hydropower station to solve the problems raised in the background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A monitoring and early warning device for the pressure maintaining casting of a spiral case of a hydropower station, including a pressure maintaining casting assembly of the spiral case. The pressure maintaining casting assembly of the spiral case includes a spiral case body and a stay ring member arranged at the lower center of the spiral case body. A spiral case top cover member is arranged at the upper center of the spiral case body. A monitoring and early warning component is arranged on the outer wall of the spiral case body on the periphery of the spiral case top cover member. The monitoring and early warning component includes a top cover outer sleeve ring sleeved on the periphery of the spiral case top cover member, a movable arc-shaped mounting plate that is arc-shaped and moves to adjust its position on the outer wall of the spiral case body, and a slider support slidably mounted on the outer wall of the movable arc-shaped mounting plate. A first displacement sensor for monitoring the displacement of the spiral case body after casting concrete is arranged on the outer wall of the slider support. Second displacement sensors for monitoring the displacement of the stay ring member are arranged on the inner walls of the upper and lower sides of the stay ring member. A stress protection and adjustment component for resetting and adjusting the displaced spiral case body is further arranged outside the periphery of the spiral case body. The end of the stress protection and adjustment component is used to apply force to push the spiral case body to reset.

[0006] Preferably, a position adjustment travel opening is provided on the outer wall of the circumferential side of the top cover outer sleeve ring. One end of the movable arc-shaped mounting plate is slidably connected to the position adjustment travel opening in a fitting manner. A connection fixing body is provided on the outer wall of the top cover outer sleeve ring and between the two ends of the position adjustment travel opening.

[0007] Preferably, positioning grooves are provided on the upper and lower inner walls of the position adjustment travel opening. On the upper and lower surfaces of one end of the movable arc-shaped mounting plate inserted into the position adjustment travel opening, positioning protrusions for sliding in the positioning grooves are symmetrically provided.

[0008] Preferably, travel chutes are symmetrically provided on the outer surface of the movable arc-shaped mounting plate. The slider support is slidably mounted in the travel chutes, and an adaptation chute opening for adapting to the travel chutes is provided on the bottom surface of the slider support.

[0009] Preferably, the slider support is connected and limited to the movable arc-shaped mounting plate by a locking bolt. A protective net sleeve is mounted on the outer surface of the slider support and on the outside of the first displacement sensor. The protective net sleeve covers the first displacement sensor for protecting the first displacement sensor.

[0010] Preferably, side limit chutes are provided on the outer walls on both sides of the movable arc-shaped mounting plate. L-shaped side limit sliders are fixedly connected to the outer walls on both sides of the slider support. The free end of each L-shaped side limit slider is slidably fitted in the side limit chutes. The L-shaped side limit sliders slide in the side limit chutes for limiting the sliding of the slider support.

[0011] Preferably, a detachable end plate is installed at one end of the movable arc-shaped mounting plate away from the top cover outer sleeve ring by screws. After removing the detachable end plate, the slider support slips off the surface of the movable arc-shaped mounting plate.

[0012] Preferably, the stress protection adjustment assembly includes stress prevention peripheral arc-shaped plates arranged at intervals around the outer circumference of the volute body and a plurality of stress displacement adjustment electric push rods equidistantly installed on the inner wall of the stress prevention peripheral arc-shaped plates. The free end of each stress displacement adjustment electric push rod faces the volute body.

[0013] Preferably, when the volute body is displaced, the free ends of the stress displacement adjustment electric push rods all apply forces to abut against the outer wall of the volute body for resetting the volute body.

[0014] Preferably, shock-absorbing and buffering silica gel pads are embedded in the bottom surface of the slider support and on the inner wall of the matching chute opening. The shock-absorbing and buffering silica gel pads elastically abut against the protruding surface of the movable arc-shaped mounting plate for shock absorption and buffering of the slider support and the first displacement sensor.

[0015] Compared with the prior art, the technical effects and advantages of the present utility model are as follows:

[0016] For the monitoring and early warning device for the pressure maintaining casting of the spiral case of the hydropower station, by integrating the first displacement sensor and the second displacement sensor, this technical solution can monitor the displacement changes of the spiral case body and the stay ring components in real time and provide continuous data streams, which is more efficient and accurate than the traditional manual regular inspection. The stress protection adjustment component combines the stress prevention peripheral arc plate and the stress displacement adjustment electric push rod, which can actively intervene and adjust the stress distribution of the spiral case body to avoid structural damage caused by uneven stress generated during concrete casting; when it is monitored that the spiral case body has a displacement, the stress displacement adjustment electric push rod can respond quickly and apply an appropriate force to assist the spiral case body to reset. This instant stress adjustment ability greatly enhances the overall stability and safety of the structure.

[0017] The combination of the movable arc-shaped mounting plate and the top cover outer ring, together with the position adjustment stroke through hole and the positioning groove, provides flexible installation and adjustment options for the monitoring sensors, ensuring the accuracy of the sensors and maintaining high efficiency even in complex construction environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0019] Figure 1 is a structural schematic diagram of the present utility model;

[0020] Figure 2 is a structural schematic diagram of the connection state of the top cover outer ring of the present utility model;

[0021] Figure 3 For the present utility model Figure 2 is an enlarged structural schematic diagram at A in the present utility model;

[0022] Figure 4 is a structural schematic diagram of the connection state of the movable arc-shaped mounting plate and the slider support of the present utility model;

[0023] Figure 5 For the present utility modelFigure 4 Schematic diagram of the enlarged structure at B in the middle;

[0024] Figure 6 Schematic diagram of the installation state structure of the L-shaped side limit slider of the present utility model;

[0025] Figure 7 Schematic diagram of the split state structure of the adapter chute opening and the shock-absorbing buffer silicone pad of the present utility model;

[0026] Figure 8 Schematic diagram of the connection between the stay ring member and the second displacement sensor of the present utility model.

[0027] Explanation of reference numerals:

[0028] In the figure: 1, volute pressure-maintaining casting assembly; 2, volute body; 3, volute top cover member; 4, first displacement sensor; 5, movable arc-shaped mounting plate; 6, stress prevention peripheral arc-shaped plate; 7, stress displacement adjustment electric push rod; 8, monitoring and early warning assembly; 9, stress protection adjustment assembly; 10, top cover outer collar; 11, slider support; 12, travel chute; 13, position adjustment travel through hole; 14, positioning groove; 15, connection and fixing body; 16, locking bolt; 17, side limit chute; 18, detachable end plate; 19, positioning convex block; 20, protective net sleeve; 21, L-shaped side limit slider; 22, adapter chute opening; 23, shock-absorbing buffer silicone pad; 24, stay ring member; 25, second displacement sensor. Detailed implementation manners

[0029] In the following description, a large number of specific details are given to provide a more thorough understanding of the present utility model. However, it is obvious to those skilled in the art that the present utility model can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present utility model, some well-known technical features in the art are not described.

[0030] Unless otherwise defined, the up, down, left, right, front, back, inner and outer directions involved in this article are based on the up, down, left, right, front, back, inner and outer directions in the figures shown by the present utility model, and are hereby explained together.

[0031] This embodiment discloses as Figures 1 to 8A monitoring and early warning device for pressure maintenance casting of a scroll case of a hydropower station, as shown, includes a scroll case pressure maintenance casting assembly 1. The scroll case pressure maintenance casting assembly 1 includes a scroll case body 2 and a stay ring member 24 arranged at the lower center of the scroll case body 2. A scroll case top cover member 3 is arranged at the upper center of the scroll case body 2. A monitoring and early warning component 8 is arranged on the circumferential side of the scroll case top cover member 3 and on the outer wall of the scroll case body 2. The monitoring and early warning component 8 includes a top cover outer sleeve ring 10 sleeved on the circumferential side of the scroll case top cover member 3, a movable arc-shaped mounting plate 5 with an arc-shaped movement for position adjustment on the outer wall of the scroll case body 2, and a slider support 11 slidably mounted on the outer wall of the movable arc-shaped mounting plate 5. A first displacement sensor 4 for monitoring the displacement of the scroll case body 2 after concrete casting is arranged on the outer wall of the slider support 11. Second displacement sensors 25 for monitoring the displacement of the stay ring member 24 are arranged on the inner walls of the upper and lower sides of the stay ring member 24. A stress protection and adjustment component 9 for resetting and adjusting the displaced scroll case body 2 is further arranged on the outer circumference of the scroll case body 2. The terminal of the stress protection and adjustment component 9 is used to apply a force to push the scroll case body 2 back to its original position.

[0032] In this embodiment, the monitoring and early warning component 8 is installed around the scroll case top cover member 3 and includes a top cover outer sleeve ring 10, a movable arc-shaped mounting plate 5, a slider support 11, and a first displacement sensor 4. Among them, the first displacement sensor 4 is used to detect the displacement change of the scroll case body 2. The stress protection and adjustment component 9 includes a stress prevention peripheral arc-shaped plate 6 and a stress displacement adjustment electric push rod 7 around the scroll case body 2, which is used to actively apply a force to adjust the position of the scroll case body 2 when abnormal displacement is detected. During the concrete casting process, the first displacement sensor 4 continuously monitors the displacement of the scroll case body 2. When the displacement exceeds the pre-set range, the first displacement sensor 4 sends a signal to the PLC, and the PLC controls the opening of the alarm (the alarm is not shown in the figure) to give an alarm. At the same time, the stress displacement adjustment electric push rod 7 in the stress protection and adjustment component 9 is started, and its thrust is adjusted through the PLC according to the detected displacement direction and magnitude to help the scroll case body 2 return to its original position or control its displacement within a safe range.

[0033] In this embodiment, the stay ring member 24 is installed at the bottom of the scroll case body 2 as a load-bearing and positioning foundation, and is also equipped with a second displacement sensor 25 to monitor its own displacement. The second displacement sensor 25 monitors the displacement of the stay ring member 24, providing additional data points to help more comprehensively evaluate the stability of the entire structure.

[0034] In this embodiment, a position adjustment travel opening 13 is provided on the outer circumferential outer wall of the top cover outer sleeve ring 10. One end of the movable arc-shaped mounting plate 5 is adaptively and slidably connected to the position adjustment travel opening 13. A connection and fixing body 15 is provided on the outer wall of the top cover outer sleeve ring 10 and between the two ends of the position adjustment travel opening 13. The top cover outer sleeve ring 10 is fixed to the outer periphery of the volute top cover member 3 to support the sliding of the movable arc-shaped mounting plate 5 and enhance the overall structural stability. The slider support 11 supports the first displacement sensor 4 and slides in the travel chute 12 to ensure that the sensor moves synchronously with the displacement of the volute body 2 for accurate measurement. The connection and fixing body 15 fixes the movable arc-shaped mounting plate 5 to the top cover outer sleeve ring 10 to maintain the structural integrity.

[0035] In this embodiment, positioning grooves 14 are provided on both the upper and lower inner walls of the position adjustment travel opening 13. On both the upper and lower sides of one end of the movable arc-shaped mounting plate 5 inserted into the position adjustment travel opening 13, positioning protrusions 19 for sliding in the positioning grooves 14 are symmetrically provided. The positioning grooves 14 provide positioning for the movable arc-shaped mounting plate 5 within the position adjustment travel opening 13 to ensure the movement accuracy. The positioning protrusions 19 cooperate with the positioning grooves 14 to ensure the precise position adjustment of the movable arc-shaped mounting plate 5.

[0036] In this embodiment, travel chutes 12 are symmetrically provided on the outer surface of the movable arc-shaped mounting plate 5. The slider support 11 is slidably mounted in the travel chutes 12, and an adaptation chute opening 22 for adapting to the travel chutes 12 is provided on the bottom surface of the slider support 11. The travel chutes 12 and the guiding tracks of the slider support 11 ensure the smooth movement of the slider support 11 and the first displacement sensor 4 along the set path. The position adjustment travel opening 13 is the interface between the movable arc-shaped mounting plate 5 and the top cover outer sleeve ring 10, allowing the movable arc-shaped mounting plate 5 to appropriately adjust its position during the pouring process.

[0037] In this embodiment, the slider support 11 is connected and limited to the movable arc-shaped mounting plate 5 by a locking bolt 16. A protective net sleeve 20 is mounted on the outer surface of the slider support 11 and on the outer side of the first displacement sensor 4. The protective net sleeve 20 covers the first displacement sensor 4 for protecting the first displacement sensor 4. Side limit chutes 17 are provided on both outer walls of the movable arc-shaped mounting plate 5. L-shaped side limit sliders 21 are fixedly connected to both outer walls of the slider support 11. The free end of each L-shaped side limit slider 21 is adaptively slidable in the side limit chutes 17. The L-shaped side limit sliders 21 slide in the side limit chutes 17 to provide limit sliding for the slider support 11. The side limit chutes 17 control the lateral movement of the slider support 11 to prevent deviation and ensure the measurement accuracy.

[0038] In this embodiment, a detachable end plate 18 is installed at one end of the movable arc-shaped mounting plate 5 away from the top cover outer ring 10 by screws. After removing the detachable end plate 18, the slider support 11 slides off the surface of the movable arc-shaped mounting plate 5. The detachable end plate 18 is installed at the end of the movable arc-shaped mounting plate 5, which is convenient for maintenance and adjustment of the sensor position, and at the same time prevents foreign objects from invading. The stress protection adjustment component 9 includes a stress prevention peripheral arc-shaped plate 6 arranged at intervals around the outer side of the volute body 2 and a plurality of stress displacement adjustment electric push rods 7 equidistantly installed on the inner wall of the stress prevention peripheral arc-shaped plate 6. The free end of each stress displacement adjustment electric push rod 7 faces the volute body 2. The stress displacement adjustment electric push rod 7 is a part of the stress protection adjustment component 9, and realizes the active control and reset of displacement by pushing and pulling on the volute body 2 to maintain the structural stability.

[0039] In this embodiment, when the volute body 2 is displaced, the free ends of the stress displacement adjustment electric push rods 7 all apply forces to abut against the outer wall of the volute body 2 for the reset of the volute body 2. Shock-absorbing buffer silicone pads 23 are embedded in the bottom surface of the slider support 11 and on the inner wall of the adaptor chute opening 22. The shock-absorbing buffer silicone pads 23 elastically abut against the protruding surface of the movable arc-shaped mounting plate 5 for shock absorption and buffering of the slider support 11 and the first displacement sensor 4. The shock-absorbing buffer silicone pads 23 provide additional buffering between the slider support 11 and the movable arc-shaped mounting plate 5 to reduce mechanical shock.

[0040] In this embodiment, the stay ring member 24 is fixed at the lower center of the volute body 2 to ensure its stability and load-bearing capacity. The volute top cover member 3 is installed at the upper center of the volute body 2 and its sealing performance is ensured. The top cover outer ring 10 is installed on the periphery of the volute top cover member 3, and a position adjustment stroke opening 13 is opened on the top cover outer ring 10. The movable arc-shaped mounting plate 5 is slid into the position adjustment stroke opening 13, and its position is fixed by the cooperation of the positioning convex block 19 and the positioning groove 14. The slider support 11 is slidably installed on the movable arc-shaped mounting plate 5 through the stroke chute 12 and fixed with the locking bolt 16. The first displacement sensor 4 is installed on the slider support 11 and covered with the protective net sleeve 20 to protect the sensor from external interference. L-shaped side limit sliders 21 are installed on both sides of the movable arc-shaped mounting plate 5 to make it slide in the side limit chute 17 to ensure the stable movement of the slider support 11. The detachable end plate 18 is installed at the end of the movable arc-shaped mounting plate 5 for easy maintenance and adjustment. The stress prevention peripheral arc-shaped plate 6 is installed around the volute body 2, and the stress displacement adjustment electric push rods 7 are evenly arranged on its inner wall to ensure that all sensors and adjustment components are connected to the central control system to realize automatic monitoring and response.

[0041] In this embodiment, the outer distribution box is provided with a PLC for receiving the monitoring signals of the first displacement sensor 4 and the second displacement sensor 25 and for controlling the stress displacement adjustment electric push rod 7 and the opening and closing of the alarm. The PLC model can be selected according to actual needs.

[0042] Working principle

[0043] For the monitoring and warning device for the pressure maintaining casting of the spiral case of the hydropower station, the first displacement sensor 4 is installed on the circumferential side of the spiral case body 2 and is connected to the movable arc-shaped mounting plate 5 through the slider support 11, and can detect any minute displacement change of the spiral case body 2 after casting concrete in real time. The second displacement sensor 25 is installed on the inner walls of the upper and lower sides of the stay ring member 24 to monitor the displacement of the stay ring member 24 and further confirm the stability of the overall structure of the spiral case. The first displacement sensor 4 and the second displacement sensor 25 of the monitoring and warning assembly 8 monitor the displacement situation. When abnormal displacement is detected, the first displacement sensor 4 and the second displacement sensor 25 send signals to the PLC, and the PLC controls to turn on the alarm to notify the operator of possible safety hazards and starts the stress displacement adjustment electric push rod 7 in the stress protection adjustment assembly 9. Multiple stress displacement adjustment electric push rods 7 are equidistantly installed on the inner wall of the stress prevention peripheral arc-shaped plate 6, and their free ends all point to the spiral case body 2. When it is detected that the spiral case body 2 is displaced, the stress displacement adjustment electric push rod 7 will apply corresponding thrust to the spiral case body 2 according to the instruction controlled by the PLC to help the spiral case body 2 reset and maintain the structural stability.

[0044] The movable arc-shaped mounting plate 5 and the top cover outer ring 10 are matched through the position adjustment stroke through port 13 and the positioning groove 14, allowing the movable arc-shaped mounting plate 5 to finely adjust its position during the casting process to ensure the accurate measurement of the first displacement sensor 4 and to be able to monitor different positions after adjusting the position. The slider support 11 and the stroke chute 12 ensure the smooth sliding of the slider support 11 during the casting process. At the same time, the L-shaped side limit slider 21 slides in the side limit chute 17 to ensure the stability of the slider support 11 and the measurement accuracy of the first displacement sensor 4. The locking bolt 16 and the detachable end plate 18 ensure the firm connection between the slider support 11 and the movable arc-shaped mounting plate 5, and are also convenient for maintenance and adjustment.

[0045] It should be noted that, in this text, relational terms such as "one" and "two" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising a..." does not exclude the presence of additional identical elements in the process, method, article or device comprising said element.

[0046] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A monitoring and early warning device for the volute pressure-maintaining casting of a hydropower station, comprising a volute pressure-maintaining casting assembly (1), characterized in that: The volute pressure-maintaining casting assembly (1) comprises a volute body (2) and a seat ring (24) arranged at the lower center of the volute body (2); a volute top cover (3) is arranged at the upper center of the volute body (2); a monitoring and early warning component (8) is arranged on the peripheral side of the volute top cover (3) and on the outer wall of the volute body (2); the monitoring and early warning component (8) comprises a top cover outer ring (10) sleeved on the peripheral side of the volute top cover (3), a movable arc-shaped mounting plate (5) on the outer wall of the volute body (2) whose position can be adjusted in an arc shape, and a movable arc-shaped mounting plate (5) slidably mounted on the movable arc-shaped mounting plate (5). A slider support (11) is mounted on the outer wall of the mounting plate (5), the outer wall of the slider support (11) is provided with a first displacement sensor (4) for monitoring the displacement of the volute body (2) after pouring concrete, the upper and lower inner walls of the seat ring (24) are both provided with second displacement sensors (25) for monitoring the displacement of the seat ring (24), and the outer side of the volute body (2) is also provided with a stress protection adjustment component (9) for resetting and adjusting the displaced volute body (2), and the terminal of the stress protection adjustment component (9) is used to apply force to push the volute body (2) to reset.

2. A hydropower station volute pressure-maintaining pouring monitoring and early warning device according to claim 1, characterized in that: The outer wall of the top cover outer sleeve (10) is provided with a position adjustment stroke opening (13), one end of the movable arc-shaped mounting plate (5) is adapted to be slidably connected in the position adjustment stroke opening (13), and a connecting fixing body (15) is provided on the outer wall of the top cover outer sleeve (10) and between the two ends of the position adjustment stroke opening (13).

3. A monitoring and early warning device for pressure-maintaining pouring of a hydropower station volute according to claim 2, characterized in that: The upper and lower inner walls of the position adjustment stroke opening (13) are both provided with positioning grooves (14), and the upper and lower surfaces of one end of the movable arc-shaped mounting plate (5) inserted into the position adjustment stroke opening (13) are both symmetrically provided with positioning protrusions (19) for sliding in the positioning grooves (14).

4. A monitoring and early warning device for pressure-maintaining pouring of a hydropower station volute according to claim 3, characterized in that: The outer surface of the movable arc-shaped mounting plate (5) is symmetrically provided with a travel slide groove (12), the slider support (11) is slidably installed in the travel slide groove (12), and the bottom surface of the slider support (11) is provided with an adapting slide groove opening (22) for adapting to the travel slide groove (12).

5. A monitoring and early warning device for pressure-maintaining pouring of a hydropower station volute according to claim 4, characterized in that: The slider support (11) is connected and limited together with the movable arc-shaped mounting plate (5) through a locking bolt (16); a protective net sleeve (20) is installed on the outer side of the first displacement sensor (4) and on the outer surface of the slider support (11); the protective net sleeve (20) is covered on the first displacement sensor (4) to protect the first displacement sensor (4).

6. A monitoring and early warning device for pressure-maintaining pouring of a hydropower station volute according to claim 5, characterized in that: The outer walls on both sides of the movable arc-shaped mounting plate (5) are provided with side limit sliding grooves (17), and the outer walls on both sides of the slider support (11) are fixedly connected with L-shaped side limit sliding blocks (21), and the free end of each L-shaped side limit sliding block (21) is adapted to slide in the side limit sliding groove (17), and the L-shaped side limit sliding block (21) slides in the side limit sliding groove (17) to provide limited sliding for the slider support (11).

7. A monitoring and early warning device for pressure-maintaining pouring of a hydropower station volute according to claim 6, characterized in that: A detachable tail end plate (18) is mounted on one end of the movable arc-shaped mounting plate (5) away from the top cover outer sleeve ring (10) by means of screws. After the detachable tail end plate (18) is removed, the slider support (11) can slide off the surface of the movable arc-shaped mounting plate (5).

8. A monitoring and early warning device for pressure-maintaining pouring of a hydropower station volute according to claim 7, characterized in that: The stress protection adjustment component (9) comprises a stress prevention peripheral arc plate (6) arranged at intervals around the outer side of the volute body (2) and a plurality of stress displacement adjustment electric push rods (7) equidistantly installed on the inner wall of the stress prevention peripheral arc plate (6), wherein the free end of each stress displacement adjustment electric push rod (7) faces the volute body (2).

9. A monitoring and early warning device for pressure-maintaining pouring of a hydropower station volute according to claim 8, characterized in that: When the volute body (2) is displaced, the free end of the stress-displacement adjustment electric push rod (7) applies force against the outer wall of the volute body (2) to reset the volute body (2).

10. A monitoring and early warning device for pressure-maintaining pouring of a hydropower station volute according to claim 9, characterized in that: A shock-absorbing and buffering silicone pad (23) is embedded in the bottom surface of the slider support (11) and the inner wall of the matching slide groove (22). The shock-absorbing and buffering silicone pad (23) elastically abuts against the protruding surface of the movable arc-shaped mounting plate (5) to provide shock absorption and buffering for the slider support (11) and the first displacement sensor (4).

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